Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c3564874a7e1fb91cdfd3eabb0d00715de4e07ee2f75bb7f94752b3221f4a4f' 
  AND token = '5kF2VYJpD/LdxaSQUGYyzL0ZdThI2nPKDKqFeFXT6Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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