Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '220c66a779725119b93f65b268c54ad55053001b41fbde3d7e7f4bead42dcfcf' 
  AND token = 'SWIrhohViE/ydlHyb6mULOMW1plWIDgqFKsf+sio75M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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