Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56f5f0ae0619bbaf08140de663e5becfc271e415a24f68e894835b5036469f3d' 
  AND token = 'yNgGaw9Y4lbIkHKFLzm7Yjt9lTs9IiARWsd/CY9M1IM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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