Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '562afe6dd787777fab36e5a0e7ef93abf3d494d21ba932194d5ce0875ac63524' 
  AND token = 'uZQTgU/4b4GFCVIF9ywK82y13P9kIQZChX+ue4whubQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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