Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7009a1c9260d27f19ef13593694dc43887e9abfeadd77ab4db9c1f9d970bedbb' 
  AND token = 'QnOl1DFuWE/hnIVqjzaUtENxfZ/lfw0GXgTNj5z9IZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}