Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56683721cd900d3f41acba58bba69b28840ed03c068ef5c97393292e5f76bedd' 
  AND token = 'Eldu8gLjRqCO9M6AA+VTiUcUFZugZHsZ45/JAfUfMeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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