Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b18171d31898b8a4647a11f37f332353b553be47f36be39d7922aa015873c631' 
  AND token = 'hxvpGLw7UcSu7rGRj9upmKR4LG08T40AQQCv2jsueRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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