Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cc1fe60a047550d1041069960de67f8d89ee8c5449f9fb0090a9a9748c7fab7' 
  AND token = 'Cv39Z1CABjX7BBtHhHsS0jdaswbWGV7aWXFSFBjLMds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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