Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fa2960081d40e30e31b7774449d79f60b246336cfb495629799f124746b5288' 
  AND token = 'QRjrjnXMDxzvjQ6rYO2Bax4WA6pDMxgRFqQD+n1Fe0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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