SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '38b9f54028650bfc9b32d161ee6dfd808f0c57a291ef29a456747c3a46eba1fd' 
  AND token = 'ncQnDkKxAY6n0PIYD8HE+wzdyOx53UN17tSvYgG2ibQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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