Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8c0482893f17f3c64f7cd3549a607198e460607de1138ba8de9cc859e378b386' 
  AND token = 'NKmvg1+qDeSamK2fPmASHKTB8HhO0lBTUt8FTMr2eMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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