Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7954c28e18af2844c585b8831b4506b8ad79acd654e4d5e63f34072fb3012b0b' 
  AND token = '3YBAdFRw9oov2Gzho7zuQh8faH3/az7/0XRfXg4errU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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