Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31a744fe5dd84600f72821e8b195c7a7b8435348af4474803e39de8a0f669d62' 
  AND token = 'af/aO88vJ+iQijUAXrYjDcdbbRjXiG/0+nkvSBnEcN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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