Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb86482cf50917264efd0da53afe62fe40df570c752705434ce0fe05c09a6b71' 
  AND token = 'ZqKiUsRiXpHO5F2n7v5Ryn6PPpHLM00MysPnVVfVvfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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