SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '723880d9337eab2b3f35fdfa72bb7e5557d23dcb7998354ae7b6f124ee2d5458' 
  AND token = 'FwOMB6g/ywu8i7egLKwp44DgwNGrpI+u8LDH8VK5vvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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