Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '041e5157f7460c131f08c948cf3bba521fe1f236bf01c6a82528d6843509733c' 
  AND token = 'k7JO9+JFwAk7ayt4Zle7OS39YVu87K7iMKqrqtpAcqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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