Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45a312cb70c930af00a7d80cff13e87d3d98f99d33b6088c8f1b153b9a2e0b69' 
  AND token = '6ZxPIYwRy0bC61JcVeVhZePW7JgNUlpHZoWKlfO/PsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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