Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c9af78c8f7641f4fecd0db129e01cc73e110e5f5ce474b96ab68b9e288a7089a' 
  AND token = '0DkyuqaBLV4is2UWFntD4EPD4y15zkUyqJjVC7wt4bQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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