Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e63c91e6fdebac45cd1f5d869b53d408658de59e32567ec256a3708a192846e3' 
  AND token = 'DI2uIEcAAYSaJltoPg3d3wRBF9+NGWpQ6edBloi47BE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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