Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b6c011c37620b71da6ca73037f4ba1124405f7a25cf9a0d055bdceb21dd3bb2' 
  AND token = '6BN6eq1WtvJCl41PmYX7oebSTFuhKcnJ5nW8FfoWblQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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