Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35a7630d4455c90c77776ef0c979e25c34c0d549c24d57353a0531b850b65d96' 
  AND token = 'fV9cYo7jmHI5n4Q70Fwoq12lyOLmhPMrohe9f65z2VM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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