Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7efd8369842123e44935ef92499a3e3d43d7b9a484647f6eec7f673e7b8279e' 
  AND token = 'TUTEntpaf6lm+h+EILcC9D02dWfCpLrtDodlDreq6EU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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