Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0cf7d8410a836a6ed2eac9d6c4785c5f6201f63e772a042bae32a59f9d2dbe3' 
  AND token = 'rc7NBsOxTjAR2rl53uMJw/JziIb4p3ye312mfyrRgN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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