Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '798de4acd2a77488482579aa4de9eef502d49e695c8a42ba47cb0d6861c8a248' 
  AND token = 'rimuuktO6MCu2y9zBYuQ5Mfr8xPzIzgdBZiA/N+L6cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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