Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feeb85af68ff6f9ccc91c44c264fb72ae2c7867bc9b68f8404c5f1864e119dbc' 
  AND token = '5cIiGJtPR0mU6Ygvzqce8Z1o5irHGKH4wjMgVmjwf9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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