Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a87e360e7b950bf0d98aba66f6d6b607633925841db69b5ba5f00d3c3c65148' 
  AND token = 'HDWofAqxZYH5WmRM8aiJmlwg6lwWHQNmvDP2ZaxmGSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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