Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcd45f84bdfdaf12a0c9f3ddd24e33410b0a62f0cf14d54ed9feddf0d8a13abf' 
  AND token = '5c+7KBbDNSUeBJrqNnl3WlQGZ8emkYzkXDNVvckLTdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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