Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27a8c3bff5f6677d055c91480b8c3ca04ad523c2a610f99a5e891741b4f3afa8' 
  AND token = 'Qd8EojNTC3uIVGQAH1UBbTxrFjCXXeEs/Ge74vawYvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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