Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd017422c7fdb3b8e44ae298fc706f24290b2f7313da0d37d30144c9bc8893583' 
  AND token = 'kzkfOZ/+WZtbZJVOrnhywUcbOsnKsiNEIILho4u+t7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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