SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93855471d70eb4078790c01e081b34f86b5bf34200443d1c9727b502985a59ed' 
  AND token = 'FxVojdcNJ5EhK6qZGK6DgMtQ3mBqLBFJgY70+GB8bK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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