Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '105c0b4cbbe816ce777f452138b29895c7d6ee4b533697967396019c630a6927' 
  AND token = 'd1xBcGa26yeeTMijYbxDs0jubyji0HVVHStPupEdbLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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