Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '027c7966aec50094c25bf6696867752239fc059aa3ac5f714ccf5c4dee8c1a63' 
  AND token = 't9hC0wYOGhzELDisNBsw2TbgpCN6WuNdvi8elhp8mJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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