Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be1f0fa5d29b1dac4cbccdb8c858d876bd4cc2799da9a0e855bb3de456cbb95d' 
  AND token = 'TEJ+K4WnnoGlajtyhiODgX+L9zIuvdI0RLh4Oiwc2wM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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