Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4c62e7f7987c709043863514d90ba6468d81f79a5d7bcd83daedddb66e33168' 
  AND token = '4rPiqMkRRSiJcg2lJw01TlT82tdklxBdqccdxybiS44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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