Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9700dcc7c9dcd326779d67f6d107eccdd3426ba59f654250046020a30aba9eca' 
  AND token = 'mmUFDiDHvoGuv7vq34s4mXnNbIE6UEB4qCRU433ZJIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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