Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '914ee83c10bd5856e38ee93bbe49ff544c6b223440bbae9c332bb574ae806c4d' 
  AND token = 'IKb9lChEBnmDoXrQK/IJ4j9EmwGN3GEaj9yQMJqz3Pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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