Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4e83490252a8d355aaaac8d10258cebf34e35c79933db819be84325a80be7fb' 
  AND token = 'hM11L6b+dXYLu2Y8pYGy62vmuFKAgpyNp2bxGsPH5IY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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