Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fec671c0958f21af63a872d8cc221002223c34a618b8a9cf90be5b188570baa9' 
  AND token = 'UfRjnuvzNXngdSrkuIVgb1NDlB9Q+fx6On1r0sT0HcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}