Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7d2b75e25687fe7c7be486c9bfacca150e7ff1e0eabf10b15c019573dfec7fa' 
  AND token = 'fizX83OlPPdcyRDfdMFnkQay/P45LupVQuHJ11vrzE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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