Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '555bb66f949fa4cfd64083ff77e705a4b2ba487168a34abc6ed5dea0a0c495f3' 
  AND token = '0Hxu3/6VVX8DAz+D9l4v5ysJVDg6skvoqmIDAZWP0b8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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