Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c115db08eb8ac86549f93e825b49102936af48346b34c99206e76e572be04ac' 
  AND token = 'qIp3cTDghmIIZstCFdaeIHAf/9ny/Z9L0TArllbWmHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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