Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c9aae8310ccbfb9ebb76c358ffb30edefc8183b0f1fea0207083b7e070eef8c' 
  AND token = 'QwLQXAoop+fYH402E06bRV68eZerayMdurszoNbL+T0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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