Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6448d93fe6fdb1f2e78d513faeff9ee31a74717c7aa09e94ec726b4760c4accc' 
  AND token = '1eaVsDyzFkdSWOLHVHSY1zXIwWc4m8MZjKOaQ3lsxso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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