Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f0b8e73316b32d4c51b98eed196159bf4417b971eb94ea894cdc2ef4ca2f837' 
  AND token = 'ToUhQ6lAc6cMtfmJgxXdMjKvWSKl4WaJXqKmUOQGv6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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