Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cbd428a1ebc32f04a0d5c91f1c7dbff9d344ae5c0b2f7cdaa75d997b383dda19' 
  AND token = 'uJo1FNwsIocLi9CfBLF0++v/3NWa7DjoXo6D3HRT3KM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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