Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3361f4659b45b7225d7ac4d4e0dc2d7ff81fce08387ac12d24bfd5e230710092' 
  AND token = 'c8t3A8+LEt8Yv77piquDmn/Tx8RU3bMIPNh8WjsHioo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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