Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2974a0e0429235eb5bbc7f12eced891dbb9add950de51fcb644bcfab7814aa26' 
  AND token = 'QSWBgJH/mcNTku7bvZ5e9Aj74JVRnXWWCfeyTLrXwss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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