Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45e4e4b08271a6117b9167b36b3b335c9e6053c3bc4225f09bf7378df52c6d7c' 
  AND token = 'heuuntHi+vVsDEy//tAi6uQEa0KZcTAcb9GL4V7urMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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