Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a25d61bdfefba3bfe57e51d07cc895f92c82ea8d370254d65d18c868d737ef90' 
  AND token = 'iKaT9PKKnn5hElqOgV2XagyS2MB6L7+1kGfabRw4VGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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