Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5dabd67e5987aa93e15c30d94e4929ded005bcaa1985b7f1641502366f49898' 
  AND token = 'AHb+YKZbTXTAbvwKwcA6eyMz6RJcYOUC6vcVVM9mgog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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