Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '317149c966c8149610e4184d672b5cece8015407fe7c385f8b263fdc08e6fa68' 
  AND token = 'cmyhOHQxZjba6irZMjcLB4kOhxeZswSHhYOvFP629co=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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