Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f2b0dad925fb4021fafd4ff50bb383b143f00ab8d9d390132f75e7c2d4984c4' 
  AND token = 'QV9r6za8xfDEBFfkSsjC2rE1NCJMn5L9JZOcgqKe/6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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