Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b4f0233781b19158b58c7787e4554e0bfe78b5574b68086939fd41e993b3244' 
  AND token = 'zGpQDbJzr8weKWoXMZ8qyEckYkONMB/OzLKAfxhBOBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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