Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de262bb5cf88fc23c205880d79a04ad3025b6a3ccfeb7dd5e04f240b32e0a07e' 
  AND token = '34LEg1txo43C6B328cm/gqYRcm7jJFdmKEIUJVCKcxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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