Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcc3788dadcf7ca5e0502daf4a98df7dbfb557af22e757d0cff1adbe479dac3a' 
  AND token = 'M1O7Ned8WCXFUluMJxPbDL14KqOqzRMRe+eRjnD3Wr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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