Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c839861285bbae42d2c910a1b101288bb23a9e0ae69f52be841d7838fc9250b' 
  AND token = '59K9xbiOStPQ9Gmjecan2f2i593MwGOu0B6PWjMMwtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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