Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a69f3dfefe5d54cf19ba2861a4374ccee686f0d8a49d35140f43e8cfd7ff15a4' 
  AND token = 'TFpQr/+mSrqI68OJDZEvymuoWIZSxAT3twD2YW0b2ec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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