Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ec6f7968aa82f96198797fb99a7ffca91b4c86ed5c4b288b0c61b8dd3d64055' 
  AND token = '4bEz3Qo6vPYO2eRspL8lI0y+4bGjRdjLSjWPngG0cls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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