Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9b155a2c070ac5934ed305d594cdbc2782e5afde998f7cd75f261e7ff7d40520' 
  AND token = '2FZIPTNlHuM0UXz1ESXF8yyC5W+5ZqPN0ldJ1bJQXZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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