Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4515b5dade465d413243bcd6ef094b7d72fbe56ab3eb865e65ce07a4aa406f33' 
  AND token = 'IIkRE5G/yT9/ow9aUPndXlo6Y2WxlOM9YWB401YECQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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