Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30e097450b75d5b88bc56c607de1f00ab1dc2524f714c8586126cdaaa53fdf7a' 
  AND token = '5rmS3hgvqOvuDbB8+XRkGrrAEr/q3+5s8N7y1jbhCug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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