Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8bf361901e7930ca05defd89bb69ec59e5ff6c3f7ea38ca6806d72ad709b724' 
  AND token = 'YL6vUiybEjw6qBnt0y3MDwl9om3BMdAsiTLLk5fGM3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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