Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c777e27809a369d7244fc9396956dac4991b36a6795bbc698875ac58090893ee' 
  AND token = 'AMC+Wlr2rk2tWPnRXvVGXuKw1ME00TL8u8z3AKgtXFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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