Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdc2d5212d44e31e66e20e840f3c4781b32fcf6876c12937673f7e09ed049c78' 
  AND token = '6QxiUwEENlJYu4z25WQCvb1FOhvc3lM6LLLQBOZTDY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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