Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d334f8f7f6fea2e09a11f4f1ee05fdfe5611d94ab29ba9de1ae66d09f1fc9b7' 
  AND token = 'uxi6k03xmNDO8bbKeuyOM5QFd7fpkohnVU8JofL9elA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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