Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab22abf9ee8cf0f120ccffbaa734a2f5f74b2090bfed470383dea15756cb9b27' 
  AND token = 'vD7xUSwhUsxct8nfjx31ZVTettEeYHK05wErpgd8vV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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