Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '726f4829b5beabf732d78ef78807edd70dedff4e2934755964b24418da905834' 
  AND token = '0cKWUwK3jTdFm8pW+ZH7YIp55XiH6qCX3Dyf2xM1bxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00101

JSON explain

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