Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '008a607f0acb765a7d97d7597f2655a7af276dd6a5d543bbb0dc1bb82e7afafd' 
  AND token = 'S6W1P5Nf2FKnnIkXXcJ0QlT+WlYb1N9/zUFnu3glAqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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