Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b467f3668f624fd95f7c9161b629c4f68f1a0620b2df8a2509a32f8d96383e58' 
  AND token = 'lgYb4DTAR232ZI0JlWeZcWn76KKgErZV5CjNQU1gGFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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