Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f94efee2bdc4aad0e39ba8b2aef8166f703001336db7c504265c38c049b5dbf' 
  AND token = 't6J3NMPsBFZBuLtmVwTffG3kDOrJtePG/gy1Ky2EZRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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