Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '741403b9a45a6764940742e1629afbdd44df4f0243758a5d32333fa655101ecf' 
  AND token = '2E4xJWddn1SvF3gQm37/IEF+0behTle4jXQlv5h8JsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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