Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35ebd6aee84a2fe3dda12ee6e0ccdf0cdcdb6d65705b15fbd345092591b4d8e3' 
  AND token = 'G0jgmG9V+Re4F2UuV5HKRn3Q0+Q3A0DRzTPjUWO4rfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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