Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '362948833d8530fa778d8d61b274065fc5279ecdaf89aa56235a15b068712572' 
  AND token = 'BpR3eiFDAex5RKVAhTEi0maZwMW9EmOqLk9+Y/465FI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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