Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2006056f46d254e4dc4d0e7417e76e5c44ea306d336eb1bce2cb83b2cbbdcf91' 
  AND token = 'dddY9kqXcFfDCoNxRxYouNeVHtX4Ll+f75XHYvQx1rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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