Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '610ee0d9d77cb9bb55e97f527a2bedf5cfce1f1efa73ca4f46a50b60ee5c7ab6' 
  AND token = 'fDtxUnmwQKoq1i4IHa7MZxNoJfALfE+J6mR++nnK/G0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}