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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65ca842cf39bf39234d2abd897d3cdb6b85053a72eeab1efd02c9f5a97d4ba2d' 
  AND token = 'TMwI5CT9qUi0FFbfqKveyVSX5HAmqsf+wO9TeEYe6jI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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