SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30ab73b9dd5b4347c241f8828496e49014d286e453ec43b70df8f7033edda86f' 
  AND token = 'TPBvuSMhnXHDc9UixHVgsV+lq0vQ9z6yoFvB2JVla0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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