The term appears to me to be original to William Lane in his 1965 discussion of the beliefs of the Corinthians to whom Paul wrote (Lane, William L. "I Tim. IV. 1–3. An Early Instance of Over-Realized Eschatology?." New Testament Studies 11.02 (1965): 164-167.) Bernardin Schneider derives his 1967 use of the term and notion solely from Lane.
The term was undoubtedly influenced by C.H. Dodd's popularization of the term and notion of "realized eschatology", but does not appear to originally have been a theological reaction to his work.
The following are early sources discussing the over-realized eschatology of Corinthians, which I do not have in front of me, and may or may not use the term:
- E. Käsemann, Essays on New Testament Themes (ET, London: SCM, 1964)
- C. K. Barrett, A Commentary on the First Epistle to the Corinthians (London, 1968), p. 109
- E. Käsemann, New Testament Questions of Today (E.T. London, 1969) pp. 125-6.
- F. F. Bruce, 1 and 2 Corinthians (London, 1971), pp. 49-50
I expect these will be similar to Bartsch (1965), who discusses debate between realized eschatology and non-realized eschatologies in early Christian thought without using the terms "realized" or "over-realized".
The term became frequently used in discussions of the eschatology of 1 Corinthians (Barker, 1969; Talbert, 1977; Thiselton, 1978; Bauckham, 1980), and later in discussions of Luke (Talbert, 1977; Mattill, 1979).
- Barker, Glenn W. The New Testament Speaks. Harper & Row, 1969, p. 176.
- Barrett, G. K. 'Christianity at Corinth' in Bulletin of the John Rylands Library XLVI (1963-4), p. 269-97
- Bartsch, Hans-Werner. "Early Christian Eschatology in the Synoptic Gospels." New Testament Studies 11.04 (1965): 387-397.
- Bauckham, Richard. "The Delay of the Parousia." Tyndale Bulletin, vol. 31, 1980, pp. 3-36.
- Mattill, Andrew Jacob. Luke and the Last Things: A Perspective for the Understanding of Lukan Thought. Western North Carolina Press, 1979.
- Schneider, Bernardin V. "Corporate Meaning and Background of 1 Cor 15:45B." The Catholic Biblical Quarterly, vol. 29, no. 3, July 1967, pp. 450-467
- Talbert, Charles H. What is a Gospel?: the genre of the canonical Gospels. Fortress, 1977, p. 120
- Thiselton, Anthony C. "Realized eschatology at Corinth." New Testament Studies 24.04 (1978), p. 510-526.