Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2587603eb07516291c07bbce8293ff28cc8b750ce39def78eacea727d7664d2' 
  AND token = 'pfBRfkze06D0h/AcbLqR5UxdJgH+1wMp05SFAwwj6l8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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