Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5da156ad0e9a42f00cc8e9152f5f6f075f2269e05b444c37c767f4fe969ab277' 
  AND token = 'x2vk4sCSolNlO5I+RXYscjPodmLWNw+LfTesFcTe524=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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