Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd10d31eff06bce1d9dcb8e498ba04b21897794222ecb43fda7703b14a3c2191' 
  AND token = 'IqBsxGuyuL30VQ1N4nc2urYNC29KheZLpeQTk0vFB3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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