Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1627f2ed4004d277716a1c3cc96c6f8471013cb008a1e0a4398eb67332f42d7' 
  AND token = '2pQGODG97i99SPz1BV5rqDpoxTlUv6Hqg+HCOAiI+Sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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