Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff1ec264622ad55d3e62dcde965b4c26b69927edfaabe433ab17a351a7f4a8e2' 
  AND token = 'hvq72ONo1UUfS9g8y85Lyew5BnFaMyhu7p+bWStwAhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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