Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd210660c7400a83e85ca15b12ec6c2820686dd60a0ab3f2d790f82ab0df08db1' 
  AND token = 'C2AFO6iJqcu5GPImWq0JjLlFC8jcPP0jN7GX04iyYF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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