Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7ca9e82cd13be0f8ea211cfe65ab016d5dc363238d06cb0a986de0ce9f8c6cd' 
  AND token = 'f7jxN1midwqezAWaoNgphjExZwZm6WCq/MAT2VZn6m0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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