Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff6d9c2f3fd032b935a03a077e94163ebea04f357d811bdac223d98674445e2f' 
  AND token = 'IFg8/eUqqWwNiLbcjUtFfVUw6sRZHRqmSGOg40WwEn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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