Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd79e575490fca041bdc2e5ef137eedc9185b5709a1c434ba2ff3351751c38ba4' 
  AND token = 'BeqSwJC0CqTQHMbc7Ic0M/jbIyT0kRJhuGPnJ/fwfc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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