Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40481f6af5f12383753097a3b587b4c405385b001dc43ed2c01cc73c81ef617a' 
  AND token = 'VSdbkbC4RBRvU+gCe3dZaMYBbH21yCc9OuUiwZBy5uA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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