SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '981e8c23857352546a28bd2b854987b7d08560a0fbf4cfc50dfc6889a4492e73' 
  AND token = 'bzJY2KXwUuhvFcY9cyxrOCo0eiVRMoCqpZp8grNOc3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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