Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '314a4f5d2b49473a08e9af32b29dd3111b559bff31be53dcc5346019d1c4abef' 
  AND token = 'uvuW9Wg7RXX+ckhiocgrltK1N/soyZNfshuYRTHp2L4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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