Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47171207f2e54e50a7f0a69820e6108bdbcd44d15297ef6b3b3331995aea77d6' 
  AND token = 'xI+5NirYFD/b8dp9FQ5uxs30OG58JOI+csxBkTO+d/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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