Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0ff3f383f99ff223f7eb4f67c1432511b2722d12c4776625f43d52b4cd03146' 
  AND token = '7StiaHtCJ3DbyUbnqCY3RIsHCWHZsEnUiuOSXgfiV8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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