Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '650766b8bee9be1cf6f9534d6b5dd34cc5971024b6aa50b6d4e4135d4393d5c6' 
  AND token = 'bUhEBFoLK94cly1IoRrtLgdVTk7wP+qd0UO49Xerj1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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