Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f6805f2da9edf26e68f4427d834f77c8989c527be6070753d6e0e8022453621' 
  AND token = 'QsvPzMTEsmV/eyXRQzFz9eUWl517Jv8gKLc6m6Bs24o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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